Overclocking EVGA GTX-580 3GB - HELP!

So, I have the GPUs that I really wanted and they work beautifully at full resolution (8100x1600) for me.

I'm using the latest drivers (275.33) and they seem to work great.

I want to try and overclock the GPUs but haven't come across any threads/posts about OC'ing the GTX-580 3GB models.

I tried doing it on EVGA Precision and moved the slider to 832MHz Core Clock and the Memory Clock to 2050MHz from 2004MHz (stock).

I tried to run 3DMark Vantage and Unigine Heaven 2.5 and both froze and I had to hard-boot the computer. It is running at stock clocks now but I want to OC them get the best performance out of the cards.

Ur better off with Msi Afterburner so u can adjust voltage too, also don't try and get too greedy, forget the memory for now and just work on the core, keep increasing it in 10MHz steps and test, once it fails u know 10MHz less is the max stable overclock for the current voltage, now u need to increase the voltage 1 notch and retry the last failed overclock, just be aware to monitor ur temps when overvolting. Once u fins a nice overclock u hare happy with then u can leave it on that setting and try the same thing with the memory. Edit: Also the memory don't overclock too well on the 3Gb cards so if u can get it to 2050 stable i would stop there, even 2025 would do really as memory overclocking doesen't really produce that much difference in benchies. Could also be a power issue, what psu are u using ? or infact can u list ur whole system specs plz

i run 860-2025-v1025 stable but see what works best for you (i had it in the 900s and mem in around 2100 but random bsods quickly changed that and i didn't like the voltage up as high as it needed because it kept my 580s in the 70s under load (with fans blasting at 75%)

I love EVGA's forum's; I read that 1.088 v is the 'safe' voltage (from an EVGA employee) cause that is what some 580's naturally come at. With that voltage I got my 3gig 580 at 883 and 1049 on the mem. Safe and doesn't void the warranty.

The SC and FTW cards normally ship with the slightly higher voltages of 1.038-1.088, E-Leet is an Evga app that lets u overclock upto the BIOS limit of 1.15v without voiding ur warranty, most ppl use Afterburner tho as u can so it all in 1 app, pretty much the only way to void this warranty is to physically damage the card or to use a modded BIOS and brick it.

I been playing Battlefield 3 for hours at a time ( I think 6 in a row is the most so far)- stable enough. I use Furmark Extreme burn in and Unigine (about an hour each). That said, I normally load the normal profile anyways now- no need to OC right now cause nothing really maxes it out completely yet anyway- I just wanted to see. Same thing on the CPU. On H2O but back at stock speeds.

1. you are prob at the max of one of your chips without phase change or something extreme if you are already at 1.15 volts. 2 Don't OC the mem more than 50MHz on the 3 gig cards. 3. SLI- u gotta consider the extra instability placed on the PCIe bridge and SLI bridge with two heavy cards like the 580's; nothing is free- there is a stability trade off with both Xfire and SLI that cannot be avoided.

Are you sure those voltages are correct?Stock on my 580 3GB was 1.018, not 1.18.Also, don't OC the memory. Leave it at stock which I think is 2004. Unless your talking about the classified cards, those are different.

I use MSI Afterburner and it's as simple as just moving the slider over to the desired voltage. Although, the latest version of Precision has been released to allow voltage adjustments.

I have my cards set to 1.05 which give me 865MHz on the core clock. I don't touch shaders which is linked to the core clock, and I couldn't touch the memory. It would crash even with a 10MHz bump.

My impression is that 1.10V and below is a good 24/7 overclock. I choose 1.05 just to be uber conservative and I can still run BF3 in Ultra @ 2560x1600 at 60FPS.

I choose to run Unigine Heaven for a couple ours to test my OC. I've had EVGA OC Scanner and 3Dmark11 run fine only to crash Heaven. So I just stick with that now.

At 1.10V I would start with 900MHz and run Unigine Heaven. If it runs for at least 30 minutes, raise it 10MHz and repeat. Keep doing this until Heaven crashes. Once it fails, go down 10MHz and run Heaven for at least 2 hours. I've had it crash after about an hour.

That new precision X software works great on my two GTX-580's. So far I was able to get a stable overclock from 855 to 975. So far, no crashes in Alien vs Predator, Duke Nukem forever, StarCraft II and COD MW3. I tried to boost it up to 1.0 ghz but system crashed. I'll continue to push it beyond the 975 and display my results on here.

I own two GTX 580's in SLI and tried some overclocking. I found it's simply not worth the hassle. I've increased voltage and overclocked up to 875Mhz on the core and raised the memory speeds. When benching on Heaven 3.0 I only gained 4FPS more than stock. In games, the difference is negligible. It only increased gpu temps and fan noise so I reset everything back to stock. The only thing I OC is my CPU, it's at 4.7Ghz.